I have been playing X-moto for around 5 years now (although i still really suck at it).
Thing is, i have a few development Ideas and i would like to do those changes/improvements myself.
Could anyone please tell me how i can get access to the games Source code? Or how i can create and add the feature i would like to create and add to the game's source code?

I downloaded and unpacked the .tar package, but dont know which of the many files to open? Did I even download the right package?

I am not a Linux user, since my Ubuntu version is bugged and i'm too lazy to reinstall it.